Subcutaneous concizumab prophylaxis in hemophilia A and hemophilia A/B with inhibitors: phase 2 trial results.

Results from the main parts (24 weeks) of 2 concizumab phase 2 trials are presented: explorer4 in hemophilia A (HA) or B (HB) with inhibitors (HAwI/HBwI) and explorer5 in HA. The trials aimed to evaluate the efficacy of daily subcutaneous concizumab prophylaxis (evaluated as annualized bleeding rate [ABR] at last dose level), with secondary objectives being safety and immunogenicity (assessed as number of adverse events [AEs] and antidrug antibodies [ADAs]). Patients received 0.15 mg/kg concizumab, with potential dose escalation to 0.20 and 0.25 mg/kg (if ≥3 spontaneous bleeding episodes within 12 weeks of concizumab treatment). Relevant pharmacokinetic/pharmacodynamic (PK/PD) parameters were assessed. Thirty-six HA, 9 HAwI, and 8 HBwI patients were exposed to concizumab. Most inhibitor patients (15 of 17; 88.2%) did not escalate the dose; all patients chose to continue to the extension phase of the trials. Clinical proof of concept for prevention of bleeding episodes was demonstrated in both trials. Estimated ABRs in HAwI and HBwI were lower vs HA: 3.0 (95% confidence interval [CI], 1.7; 5.3) and 5.9 (95% CI, 4.2; 8.5) vs 7.0 (95% CI, 4.6; 10.7), respectively. PK/PD results were as expected, with no difference between hemophilia subtypes for concizumab exposure, free tissue factor pathway inhibitor, thrombin generation, prothrombin fragment 1+2, and d-dimers. Concizumab was safe and well tolerated (no severe AEs, AE-related withdrawals, or thromboembolic events). Three patients had (very low to medium titer) ADA+ tests in each trial, with no observed clinical effect. These results support further development of concizumab as a daily prophylactic treatment in all hemophilia patients. These trials were registered at www.clinicaltrials.gov as #NCT03196284 and #NCT03196297.

Practical considerations for nonfactor-replacement therapies in the treatment of haemophilia with inhibitors.

New therapeutic agents for haemophilia with inhibitors that are in development or already licensed are expected to provide transformative treatment options. Many of these new therapies are not based on simply replacing the missing factor; new strategies include bispecific antibody technology that mimics factor VIII coagulation function (emicizumab), and inhibition of anticoagulant proteins such as tissue factor pathway inhibitor (eg PF-06741086) and antithrombin (eg fitusiran). These agents are administered subcutaneously and should significantly reduce treatment burden and increase the ability to deliver prophylaxis for patients. Limited real-world data and validated practical guidance on these recently licensed/upcoming treatments resulted in the authors convening to discuss recommendations on their use. Emicizumab is currently the only licenced nonfactor therapy; thus, our recommendations focus on this product. Target candidates for emicizumab prophylaxis are difficult-to-treat patients with haemophilia A and inhibitors and/or venous access issues, frequent bleeds and target joints. In case of breakthrough bleeding while receiving emicizumab, patients still require treatment with bypassing agents; the adjunct treatment of choice is recombinant activated factor VII. This treatment is also recommended to prevent bleeds in patients with inhibitors undergoing surgery. Our recommendations on suitable laboratory assays and monitoring new products, as well as the benefit of patient-reported outcomes (such as pain and physical activity levels), are included. We also briefly discuss future treatment options for patients with haemophilia B and inhibitors. Although these nonfactor treatments offer great promise, further data and real-world evidence are needed.

Health-Related Quality of Life in Patients with Haemophilia and Its Association with Depressive Symptoms: A Study in Croatia and Slovenia.

BACKGROUND: There are only a few studies in patients with haemophilia (PWH) that examined both quality of life and depressive symptoms, with only few studies examining their association. Aim of this study was to examine the association between depressive symptoms and health-related quality of life (HRQoL) in PWH from Croatia and Slovenia. SUBJECTS AND METHODS: A total of 112 adult PWH on prophylactic (73%) or on-demand (27%) treatment were included in the study (median age 46 years, range 18-73 years). Depressive symptoms were assessed with BDI-II, HRQoL with SF-36v2, demographic and socioeconomic data were collected using a questionnaire, and clinical data were obtained from medical records. RESULTS: All HRQoL scores were significantly negatively correlated with BDI-II in the -0.42 to -0.70 range (all p<0.05). Socio-demographic and clinical variables explained 28-51% of HRQoL variance scores. Depressive symptoms explained additional variance for six HRQoL domain scores, with incremental variance being larger for mental domain scores (ranging between 10-27%), and for Mental Component Summary score (26%). CONCLUSIONS: This study's findings support that having depressive symptoms is associated with HRQoL of PWH, more so in the mental health than in the physical health domains.

Depressive symptoms and adherence to prophylaxis in patients with haemophilia from Croatia and Slovenia.

INTRODUCTION: Adherence to a prophylactic therapy is obligatory to prevent bleeding in patients with haemophilia. It has already been recognized that depression is associated with treatment adherence. AIM: The aim of this study was to examine the prevalence of depressive symptoms in adults with haemophilia using an instrument designed or validated for diagnosing or screening for depression and to investigate the association of symptoms of depression with nonadherence to prophylactic therapy in patients from two East European countries. METHODS: Adult patients with severe or moderate haemophilia receiving prophylaxis were eligible for the study. Depressive symptoms were assessed with BDI-II, adherence with VERITAS-Pro, demographic and socioeconomic data were collected using a questionnaire, and clinical data were obtained from medical records. RESULTS: Final sample included 81 participants (median age was 45 years, range 18-73 years). There were 9 (11%) participants with scores on BDI-II above 14 points, the cut-off score for depressive symptomatology. In general, participants were adherent. However, there were 14 (17%) participants who had scores above 57 points, the cut-off score for nonadherence. There was an association between having depressive symptoms and being nonadherent, and depressive symptoms explained additional variance in adherence after controlling for sociodemographic, psychosocial and clinical characteristics. CONCLUSION: Since there is an association between depressive symptoms and nonadherence, it would be beneficial for both patients and the public health system for screening for depressive symptoms to be included as a part of the treatment protocol.

Ruxolitinib as monotherapy in a patient with anaplastic lymphoma kinase positive lung adenocarcinoma.

We present unusual treatment outcome in a 59-year-old male diagnosed with metastatic lung adenocarcinoma with a very good response to ruxolitinib as monotherapy. In June 2017, this patient was diagnosed with myeloproliferative neoplasm - Janus-associated kinases 2 positive - and in December 2017 ruxolitinib therapy was started. At the same time, patient was diagnosed with lung adenocarcinoma in the left lower lobe with positive anaplastic lymphoma kinase mutation and with right lower lobe metastasis. Because of partial regression of tumor size noted on the computed tomography (CT) scans during tumor investigation, we did not apply any therapy for lung adenocarcinoma. A follow-up CT scan done in March 2018 showed further size reduction of tumor lesion in lower left lobe (91%), while follow-up CT scan done in June 2018 showed further size reduction of tumor lesion in lower right lobe (82%).

Inhibitors in haemophilia A and B: Management of bleeds, inhibitor eradication and strategies for difficult-to-treat patients.

The standard therapy for patients with haemophilia is prophylactic treatment with replacement factor VIII (FVIII) or factor IX (FIX). Patients who develop inhibitors against FVIII/FIX face an increased risk of bleeding, and the likelihood of early development of progressive arthropathy, alongside higher treatment-related costs. Bypassing agents can be used to prevent and control bleeding, as well as the recently licensed prophylaxis, emicizumab, but their efficacy is less predictable than that of factor replacement therapy. Antibody eradication, by way of immune tolerance induction (ITI), is still the preferred management strategy for treating patients with inhibitors. This approach is successful in most patients, but some are difficult to tolerise and/or are unresponsive to ITI, and they represent the most complicated patients to treat. However, there are limited clinical data and guidelines available to help guide physicians in formulating the next treatment steps in these patients. This review summarises currently available treatment options for patients with inhibitors, focussing on ITI regimens and those ITI strategies that may be used in difficult-to-treat patients. Some alternative, non-ITI approaches for inhibitor management, are also proposed.

Long-term safety and efficacy of turoctocog alfa in prophylaxis and treatment of bleeding episodes in severe haemophilia A: Final results from the guardian 2 extension trial.

INTRODUCTION: Turoctocog alfa is a recombinant factor VIII (FVIII) molecule, approved for treatment and prophylaxis of bleeding in patients with haemophilia A. In the guardian 1 (adolescents/adults) and guardian 3 (children) phase 3 trials, turoctocog alfa demonstrated a favourable efficacy and safety profile. Guardian 1 or 3 completers could enrol in the guardian 2 extension. Final guardian 2 results are reported here. AIM: Investigate long-term safety and efficacy of turoctocog alfa administered for prophylaxis and treatment of bleeds. METHODS: In this phase 3b open-label trial, previously treated males of all ages with severe haemophilia A received prophylaxis regimens of turoctocog alfa or on-demand treatment of bleeds. The primary safety endpoint was frequency of FVIII inhibitor development. Efficacy endpoints included annualized bleeding rate (ABR) during prophylaxis, haemostatic response in treatment of bleeds and number of injections required to treat bleeds. RESULTS: Overall, 213 patients were dosed with turoctocog alfa; 207 patients received prophylaxis; 19 received on-demand treatment. No FVIII inhibitors (≥0.6 BU) were reported. For all patients on prophylaxis, overall median ABR was 1.37 bleeds/y; success rate for treatment of bleeds was 90.2%; and 88.2% of bleeds were controlled with 1-2 injections of turoctocog alfa. For the on-demand regimen, overall median ABR was 30.44 bleeds/y; success rate for treatment of bleeds was 96.7%; and 94.9% of bleeds were controlled with 1-2 injections of turoctocog alfa. CONCLUSION: Extended use of turoctocog alfa is safe and effective for prevention and treatment of bleeding episodes in previously treated patients with haemophilia A across all ages.

Outcome measures for adult and pediatric hemophilia patients with inhibitors.

Recent advancements in almost all aspects of hemophilia treatment have vastly improved patient care and management, and new and emerging treatments hold the promise of further progress. However, there remains a scarcity of data on long-term outcomes in hemophilia, particularly among those patients with inhibitors, for whom no validated outcome assessment tools are currently available. At the 15th Zürich Haemophilia Forum, an expert panel reviewed the most important outcome measures in inhibitor patients and considered the challenges associated with assessing outcomes in this population. A framework for outcome assessment in inhibitor patients incorporates traditional hemophilia outcome measures, such as bleed frequency and mortality, alongside measures of health, functioning, disability, social participation, quality of life, and economic considerations. It is important to remember that inhibitor patients differ in their clinical needs, perspectives, and priorities according to age, inhibitor status, degree of joint disease, and activity levels; as a result, the relative importance of different outcome measures will change throughout an inhibitor patient's life. Challenges inherent in measuring long-term outcomes in inhibitor patients include the small number of known patients, the subjective nature of many outcome assessment tools, and the risk of overburdening patients with repeated requests to complete questionnaires or participate in studies. Therefore, there is an urgent need to reach consensus on the most important and appropriate assessment tools for measuring outcomes in this population. These tools should ideally be standardized, easily applied, and internationally applicable in order to collect and generate quality outcome data.

Association of Plasminogen Activator Inhibitor-1 Gene Polymorphisms and Methylene Tetrahydrofolate Reductase Polymorphisms with Spontaneous Miscarriages.

AIM: The objective of this study was to investigate a possible correlation between the plasminogen activator inhibitor-1 (PAI-1) and methylene tetrahydrofolate reductase (MTHFR) polymorphisms and unexplained spontaneous miscarriages (SM). MATERIALS AND METHODS: PAI-1 polymorphisms were evaluated in 150 women with pregnancy in their history. One hundred women with a history of SM formed the study group and 50 women with normal pregnancies served as the control group. Also, the combination of PAI-1 and MTHFR polymorphisms were evaluated in 138 women out of a total of 150, which included 92 women with SM in their history compared to 46 women in the control group. For statistical analysis, χ2 test, Phi, and Cramer V tests were used; p < 0.05 was taken as a statistically significant result. RESULTS: Our findings show: (a) the correlation between SM and PAI-1 mutations reaches statistical significance (p = 0.026); (b) there was a statistically significant difference between heterozygous PAI-1 in women with only 1 SM compared to the control group (p = 0.047); (c) the comparison of combinations of both mutations, PAI-1 and MTHFR, with the control group demonstrates statistical significance in favor of women with SM and both mutations (p = 0.022). CONCLUSION: PAI-1 and MTHFR polymorphisms may play an important role in pregnancy complications because heterozygous PAI-1 mutations and a combination of both PAI-1 and MTHFR mutations might contribute to SM.

Switching treatments in haemophilia: is there a risk of inhibitor development?

Patients with haemophilia A (and their physicians) may be reluctant to switch factor VIII (FVIII) concentrates, often due to concerns about increasing the risk of inhibitors; this reluctance to switch may contribute to patients missing the clinical benefits provided by the arrival of new factor VIII products. This topic was explored at the Eleventh Zürich Haemophilia Forum. Clinical scenarios for which product switching may be cause for concern were discussed; when there is a clinical need, there are no absolute contraindications to switching, but some patients (e.g. previously untreated patients and those undergoing elective surgery) may require more careful consideration. Both patient and physician surveys indicate that the reluctance to switch, and the fear of inhibitor development, does not appear to be evidence based. The evaluation of more recent data did not support previous studies suggesting that particular products (e.g. recombinant vs. plasma-derived and full length vs. B-domain modified) may be associated with increased risk. In addition, data from three national product switches showed that switching was not associated with increased inhibitor risk, but highlighted the need for regular inhibitor testing and for a centralised, unbiased database of inhibitor incidence. To conclude, current evidence does not suggest that switching products significantly influences inhibitor development.

Venous thromboembolism in Croatia - Croatian Cooperative Group for Hematologic Diseases (CROHEM) study.

AIM: To analyze the incidence and characteristics of venous thromboembolism (VTE) in Croatia. METHODS: The Croatian Cooperative Group for Hematologic Diseases conducted an observational non-interventional study in 2011. Medical records of patients with newly diagnosed VTE hospitalized in general hospitals in 4 Croatian counties (Sibenik-Knin, Koprivnica-Krizevci, Brod-Posavina, and Varazdin County) were reviewed. According to 2011 Census, the population of these counties comprises 13.1% of the Croatian population. RESULTS: There were 663 patients with VTE; 408 (61.54%) had deep vein thrombosis, 219 (33.03%) had pulmonary embolism, and 36 (5.43%) had both conditions. Median age was 71 years, 290 (43.7%) were men and 373 (56.3%) women. Secondary VTE was found in 57.3% of participants, idiopathic VTE in 42.7%, and recurrent VTE in 11.9%. There were no differences between patients with secondary VTE and patients with idiopathic VTE in disease recurrence and sex. The most frequent causes of secondary VTE were cancer (40.8%), and trauma, surgery, and immobilization (38.2%), while 42.9% patients with secondary VTE had ≥2 causes. There were 8.9% patients ≤45 years; 3.3% with idiopathic or recurrent VTE. Seventy patients (10.6%) died, more of whom had secondary (81.4%) than idiopathic (18.6%) VTE (P<0.001), and in 50.0% VTE was the main cause of death. Estimated incidence of VTE in Croatia was 1.185 per 1000 people. CONCLUSION: Characteristics of VTE in Croatia are similar to those reported in large international studies. Improved thromboprophylaxis during the presence of risk factors for secondary VTE might substantially lower the VTE burden.

Hip and Knee Osteoarthritis in Patients with Chronic Myeloproliferative Neoplasms: A Cross-Sectional Study.

BACKGROUND: Osteoarthritis (OA) is a progressive degenerative disease with an inflammatory background. Chronic myeloproliferative neoplasms (MPN) are clonal hematopoietic disorders characterized by chronic inflammation and a tendency for connective tissue remodeling. AIM: This study aimed to investigate the prevalence and associated risk factors of symptomatic OA (sOA) in MPN patients. PATIENTS AND METHODS: A total of 100 consecutive MPN (39 essential-thrombocythemia, 34 polycythemia-vera, 27 myelofibrosis) patients treated in two community hematologic centers were cross-sectionally evaluated. Patients were required to have both symptoms attributable to hip and/or knee OA and radiographic confirmation to be considered as having sOA. RESULTS: The prevalence of hip and/or knee sOA was significantly higher among MPN patients than the previously reported prevalence in the general population of similar age (61% vs. 22%, p < 0.001). Hip sOA was present in 50%, knee sOA in 51% and sOA of both localizations in 41% of patients. A high proportion of MPN patients had radiographic signs of hip OA (94%) and knee OA (98%) in the presence of attributable symptoms. Among the other factors, sOA was univariately associated with the presence of JAK2 mutation, myelofibrosis phenotype, older age, higher body weight, and higher MPN-SAF score (p < 0.050 for all analyses). In the multivariate analysis, older age (odds ratio = 1.19, 95% confidence interval-CI 1.06-1.33) and higher body weight (OR = 1.15, 95% CI 1.06-1.25) were recognized as independent risk factors for sOA. On the other hand, cytoreductive treatment was a protective factor for sOA (OR = 0.07, 95% CI 0.006-0.86). CONCLUSIONS: The prevalence of sOA in MPN patients was higher than that in the general population and seems to correlate with older age, increased myeloproliferation and a higher inflammatory state. Whether cytoreductive treatment may postpone OA development in MPN patients warrants additional confirmation.

Hemophilia treatment in 2021: Choosing the"optimal" treatment using an integrative, patient-oriented approach to shared decision-making between patients and clinicians.

The mainstay of hemophilia treatment is to prevent bleeding through regular long-term prophylaxis and to control acute breakthrough bleeds. Various treatment options are currently available for prophylaxis, and treatment decision-making is a challenging and multifaceted process of identifying the most appropriate option for each patient. A multidisciplinary expert panel convened to develop a practical, patient-oriented algorithm to facilitate shared treatment decision-making between clinicians and patients. Key variables were identified, and an algorithm proposed based on five variables: bleeding phenotype, musculoskeletal status, treatment adherence, venous access, and lifestyle. A complementary, patient-focused preference tool was also hypothesized, with the aim of exploring individual patients' priorities, preferences, and goals. It is hoped that the proposed algorithm and the hypothesized patient preference tool will assist in selecting a treatment for each patient that is as efficient as possible in preventing bleeds while also accounting for the patient's expectations and priorities.

Long-term efficacy and safety of subcutaneous concizumab prophylaxis in hemophilia A and hemophilia A/B with inhibitors.

Despite current therapies, there remains an unmet need for treatment for patients with hemophilia. The main parts of two phase 2 trials established clinical proof-of-concept for once-daily, subcutaneous concizumab prophylaxis in patients with hemophilia A/B with inhibitors (HAwI/HBwI; explorer4) and severe hemophilia A without inhibitors (HA; explorer5). Here, we present results from extension parts of these trials, included to evaluate longer term safety and efficacy. Both trials included main (≥24 weeks) and extension (52-102 weeks) parts, with patients receiving concizumab 0.15 mg/kg with potential dose escalation to concizumab 0.20 or 0.25 mg/kg if they experienced ≥3 treated spontaneous bleeding episodes within 12 weeks. Endpoints included annualized bleeding rate (ABR), adverse events (AEs), and occurrence of antidrug antibodies. Thromboembolic events were AEs of special interest. Thirty-six patients with HA, 15 with HAwI, and 10 with HBwI were exposed to concizumab. Estimated ABRs during the main + extension parts at last dose level were 4.8 (95% confidence interval [CI], 3.2-7.2) and 6.4 (95% CI, 4.1-9.9) in explorer4 and explorer5, respectively (spontaneous ABRs were 1.8 [95% CI, 1.2-2.6] and 2.1 [95% CI, 1.3-3.3]). Most AEs were mild, with no deaths, events leading to withdrawal, or thromboembolic events. Anti-drug antibodies developed in 25% of patients and were low titer and transient, with no observed clinical effect in most cases. Results of the main + extension parts of these trials were consistent with results of the main parts. Ongoing phase 3 trials will further evaluate concizumab as a once-daily, subcutaneous treatment across hemophilia subtypes. These trials were registered at www.clinicaltrials.gov as #NCT03196284 and #NCT03196297.

Immune Tolerance Induction (ITI) with a pdFVIII/VWF Concentrate (octanate) in 100 Patients in the Observational ITI (ObsITI) Study.

Background Immune tolerance induction (ITI) with repeated factor VIII (FVIII) administration is the only strategy proven to eradicate inhibitors. The observational ITI study is evaluating ITI with a range of FVIII products. Methods This subgroup analysis reports prospective interim data for patients treated with a plasma-derived, von Willebrand factor-stabilized FVIII concentrate (pdFVIII/VWF, octanate). Complete success (CS) of ITI required achievement of three criteria: inhibitor titer < 0.6 BU/mL; FVIII recovery ≥ 66%; FVIII half-life ≥6 hours. Partial success (PS) required achievement of two criteria and partial response (PR) one. ITI success was defined as CS or PS. Data were analyzed for patients who achieved CS, had 36 months' observation, or failed ITI. Results One-hundred prospectively enrolled patients were included in the analysis; 91 had poor prognosis factors for ITI success. The mean (standard deviation) daily ITI dose was 116.4 (61.1) IU FVIII/kg in 14 low responders (< 5 BU/mL) and 173.7 (112.0) IU FVIII/kg in 86 high responders (≥ 5 BU/mL). Inhibitor titers < 0.6 BU/mL were achieved in 71% of patients in a median of 4.01 months, accompanied by a 93% reduction in bleeding rate. ITI success was achieved by 70% of patients and 56 of 72 (78%) primary (first-line) ITI patients. PR was achieved by 5 patients; ITI failed in 25 patients. PS and CS were achieved in a median of 5.55 and 11.25 months, respectively. Conclusions ITI with pdFVIII/VWF led to rapid eradication of FVIII inhibitors, normalization of FVIII pharmacokinetics in the majority of patients, and a significant reduction in bleeding rates.

A Cross-National Survey of People Living with Hemophilia: Impact on Daily Living and Patient Education in Central Europe.

BACKGROUND: Information about the impact of hemophilia on daily living and information preferences for patients and their caregivers in Central Europe has been limited. METHODS: This cross-national survey was conducted between April 1 and October 15, 2020 and utilized a self-administered questionnaire to collect data (Typeform™) from people living with hemophilia in Bulgaria, Croatia, Czech Republic, Hungary, Slovakia and Slovenia. The questionnaire included 22 questions regarding difficulties in daily life and preferences for receiving hemophilia-related information. Respondents were stratified into two main groups, people with hemophilia (PwH) or their caregivers (CPwH). Results were analyzed using descriptive statistics. RESULTS: Of the 364 respondents, 232 were PwH (63.7%) and 132 were CPwH (36.3%). In total, 70.3% of hemophilia patients/caregivers responded that they are kept sufficiently informed about life with hemophilia, with 68.0%, 59.1% and 56.3% of respondents obtaining information from their physicians, patient associations and via digital media (internet and social media), respectively. However, 97.8% of respondents expressed an interest in additional information, particularly new hemophilia treatment options (62.1%), which in contrast to other topics was indicated most frequently by both patients and caregivers in all six countries. Most frequent difficulties in everyday life with hemophilia were identified as mobility problems (41.8%), unexpected bleeding (38.5%), pain (35.4%), and uncertainty with what they can or cannot do (25.0%). During the 2020 COVID-19 pandemic, 52.5% of respondents reported that they did not experience any major change in daily living with hemophilia. CONCLUSION: Based on our Central European survey, hemophilia mostly affects peoples' lives by causing mobility difficulties, unexpected bleeding, pain and uncertainty in daily activities. Although the majority of respondents reported being educated about hemophilia, most PwH and CPwH respondents sought additional information, highlighting the need for continuous personalized patient education to cope with present challenges.

Overall hemostasis potential and aPTT-clot waveform analysis as powerful laboratory diagnostic tools for identification of hemophilia A patients with unexpected bleeding phenotype.

INTRODUCTION: Traditionally used laboratory methods do not always accurately reflect bleeding severity in hemophilia A (HA) patients. The ability of three global assays for identifying patients with unexpected bleeding phenotype was investigated. METHODS: Overall hemostasis potential (OHP), aPTT-clot waveform analysis (aPTT-CWA), endogenous thrombin potential (ETP), FVIII activities, and prothrombin fragment 1 + 2 concentrations were measured in 62 HA patients (30 severe and 32 non-severe) and 27 male controls. Bleeding phenotype was determined using our proposed scoring system including age at first joint bleed, number of target joints, and number of joint/muscle bleeds per year. Bleeding score ≤ 4 defined patients with mild bleeding phenotype (N = 27); score ≥ 5 defined severe bleeding phenotype (N = 35). RESULTS: The receiver operating characteristic analysis performed for distinguishing patients with severe and mild bleeding phenotype yielded following values of area under the curve: 0.910 (FVIII); 0.891 (aPTT-CWA parameter DELTA); 0.769 (OHP); and 0.634 (ETP). Unexpected bleeding phenotype was identified in 11/62 HA patients: 8/32 (25%) non-severe HA patients had severe, while 3/30 (10%) severe HA patients had mild bleeding phenotype, and global assays enabled the identification of all these patients. OHP and DELTA were revealed as the most reliable parameters for bleeding phenotype determination (10/11 and 9/11 unexpected results, respectively). CONCLUSION: This study emphasizes OHP and aPTT-CWA as a powerful laboratory diagnostic tool in identifying HA patients with unexpected bleeding presentations, with the best results achieved by combining both assays. Global assays should not completely replace FVIII activity measurement but should be a part of the HA diagnostic algorithm.

Prevalence of and risk factors for urolithiasis in Croatian patients with hemophilia.

Urolithiasis may be more prevalent in patients with hemophilia (PWH) than in age-matched non-hemophilic males. We conducted a cross-sectional evaluation of 92 adult PWH at University Hospital Center Zagreb. The primary objective was to investigate the frequency of urolithiasis in adult PWH, and the secondary objective was to determine associated risk factors. Urolithiasis was diagnosed by ultrasound and other patient- and hemophilia-related parameters were recorded. The prevalence of urolithiasis was significantly higher among PWH than the reported prevalence in the general Croatian population (10.9% vs 5.9%; P = 0.042). Similarly, the incidence of urolithiasis during the course of the disease was significantly higher than the estimated cumulative lifetime incidence of urolithiasis in the Croatian population (25% vs 12%; P = 0.001). Multivariate analysis showed that arterial hypertension, the presence of inhibitors, hypercalciuria and hyperbilirubinemia were independent predictors of current urolithiasis (P < 0.05), and that hematuria (P = 0.051) and prior urinary infections (P = 0.059) were also relevant factors.Urolithiasis is a significant burden in adult PWH. Identifying associated risk factors might help in establishing strategies for earlier recognition and more successful prevention and treatment of urolithiasis.

Association between reported medication adherence and health-related quality of life in adult patients with haemophilia.

Background Medication adherence is an important issue, not just health-related, for patients with haemophilia. Poor medication adherence to long-term therapies limits the potential of effective treatments to improve patients' health-related quality of life. Objective The aim of this study was to investigate the association of reported medication adherence and health-related quality of life in patients with haemophilia. Setting Data were collected from patients at University Hospital Centre Zagreb, Croatia and at University Medical Centre Ljubljana, Slovenia. Method Adult male patients with severe or moderate haemophilia receiving prophylactic treatment were eligible for the study. Main outcome measure Implementation phase of medication adherence was assessed with the self-reported VERITAS-Pro instrument and health-related quality of life with SF-36v2. Results A total of 82 participants were included in the study (median age was 44.50, range 18-73 years). The majority of our participants reported being adherent to medication (83%). Participants showed better health in the mental health domains and Mental Component Summary than in the physical health domains and Physical Component Summary. After controlling for demographic, socioeconomic and clinical predictors, better reported medication adherence explained an additional 4-6% of better health variance in Bodily Pain and Social Functioning domains and Mental Component Summary. Conclusion We found that reported medication adherence can contribute to better health-related quality of life in patients with haemophilia. Since life with a chronic condition is demanding, it is an important finding that medication adherence to replacement therapy can improve life conditions for patients with haemophilia.

[Twenty years of severe aplastic anemia treatment at Department of Hematology, University Department of Medicine, Zagreb University Hospital Center, Zagreb, Croatia]. / Dvadeset godina lijecenja teske aplasticne anemije u Zavodu za hematologiju Klinike za unutrasnje bolesti Klinickog bolnickog centra Zagreb.

Aplastic anemia is a bone marrow disease characterized by marrow aplasia and pancytopenia. Because hematopoietic stem cell transplantation (HSCT) cures severe aplastic anemia (SAA), it is the treatment of choice for younger patients. For many years, antithymocyte globulin (ATG) has been standard immunosuppressive therapy for those aplastic anemia patients that have no HLA matched related donor. ATG significantly improves aplastic anemia outcome, especially when combined with cyclosporine (CSP). The response rate varies from 40% to 70% and long-term survival is comparable with patients receiving marrow transplant. From 1983 until 2006, 46 SAA patients received HLA identical sibling marrow graft. In the same period, 50 patients received standard immunosuppressive therapy combined from horse or rabbit ATG, 6 methyl prednisolone and cyclosporine. Out of 46 transplant patients, 27 received a combination of cyclophosphamide and thoraco-abdominal irradiation. The overall probability of survival for SAA patients that underwent marrow grafting is 51%, and for patients receiving immunosuppressive treatment 20%. We analyzed a cohort of patients receiving treatment after 1990 and found the probability of survival to be 64% for bone marrow transplanted patients and 36% for patients receiving immunosuppression. Infection is the main cause of death in both groups. In conclusion, we documented improving results using ATG in patients with SAA.